Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and apparatus for reception of terrestrial digital television signals

a technology of terrestrial digital television and reception method, applied in the field of radio frequency signal reception, can solve problems such as signal nois

Inactive Publication Date: 2006-04-25
AVAGO TECH INT SALES PTE LTD
View PDF17 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes how an electronic device can use multiple antennas to improve its performance by finding the best way to receive signals. In one version of this technology, called a phased array, the devices move the location of the antennas around until they are all pointing towards the same area. Once there, the device uses those points for optimal communication. Overall, these techniques help make wireless networks more reliable and efficient.

Problems solved by technology

The technical problem addressed in this patent is how to improve the quality of televisions that receive terrestrial digital signals, especially when there are multiple paths for the signals to travel through during transmission. These pathways can cause interference and affect the overall clarity of the TV image being viewed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for reception of terrestrial digital television signals
  • Method and apparatus for reception of terrestrial digital television signals
  • Method and apparatus for reception of terrestrial digital television signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018]FIG. 1 illustrates in the time domain a typical terrestrial digital television signal intercepted by a VSB receiver. The abscissa represents time and the ordinate represents power. Due to multipath effects, a single television signal might be intercepted by a receiver as a plurality of echoes, such as echos 10a, 10b, 10c, occurring at different times. When the television signal is digitized, these echos manifest themselves as noise received on the television signal.

[0019]In FIG. 2, a digital terrestrial television receiver has a plurality of antennas 12a, 12b, . . . 12c. As represented by dots 14, any number of further antennas could be employed between antennas 12b and 12c. Antennas 12a, 12b, . . . 12c have different directionality.

[0020]In one embodiment, antennas 12a, 12b, . . . 12c each comprise a single fixed antenna element pointing in a different direction (different directionality) so together they cover the entire field of view from which the television signal may be ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A digital television signal is intercepted by a plurality of antennas to produce a corresponding plurality of input signals. The antennas have different directionality so they can be combined in a way that reduces multipath echoes. In one embodiment, the antennas are arranged to operate in a diversity or scanned array mode. In another embodiment, the antennas are arranged to operate in a adaptive phased array mode. The input signals intercepted by the antenna are subjected to vestigial sideband (VSB) processing to produce a single VSB processed signal, which is decoded to form a display drive signal. A plurality of input signals in a VSB receiver having a plurality of antennas with different directionality are evaluated to determine how the input signals should be combined to reduce multipath echoes. The quality of the input signals from the antennas is evaluated at one of a number of different points in the VSB receiver, such as at the outputs of the antennas, the outputs of the VSB processors, or the output of the forward error correction (FEC) decoder. Within the VSB processors themselves, the quality of the input signals can be evaluated at a number of different points, including the outputs at the front end, the outputs at the back end, or inside the back end the outputs at the feed forward equalizer.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Owner AVAGO TECH INT SALES PTE LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com